The passage implies that which of the followin
问题详情
The passage implies that which of the following steps would be the first performed by explorers who wish to maximize their chances of discovering gold？
A．Surveying several sites known to have been formed more than two billion years ago
B．Limiting exploration to sites known to have been formed from metamorphic fluid.
C．Using an appropriate conceptual model to select a site for further exploration
D．Using geophysical methods to analyze rocks over a broad area
E．Limiting exploration to sites where alluvial gold has previously been found请帮忙给出正确答案和分析，谢谢！
参考答案
正确答案：C
解析：ThebestanswerisC.Accordingtotheauthor,“tomaximizethechancesofdiscoverytheexploremust…payparticularattentiontoselectingthegroundformationsmostlikelytobemineralized(lines27-30);theexplorerbeginsbyusingconceptualmodels“toidentifythosegeologicalfeaturesthatarecriticaltotheformationofthemineralizationbeingmodeled,andthentriestoselectareasforexploration”(lines35-38).Accordingtotheauthor,geophysicalmethodsareofnovalueiftheyareappliedtositesthathavenevermineralized(lines25-27),sochoiceDisnotcorrect,andthereisnoindicationinthepassagethatageofformationwouldnarrowtheexplorer’choices,sochoiceAisnotcorrect.ChoiceBisnotcorrectbecausethenewtheory,whichissaidtohave“considerablepracticalimportance”(lines8-9)forthediscoveryofgold,iscontrarytotheviewthatgolddepositsweredepositedfrommetamorphicfluids.Andthepassagesaysthatsimpleprospectingmethodsthattracealluvialgoldonlyoccasionallyleadtonewdiscoveries,sochoiceEisincorrect.
